1990120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4523}}^1$

素因数の和:4545

約数の個数: 32

約数和(自身を含む): 4885920

約数和(自身を除く): 2895800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 4523, 9046, 18092, 22615, 36184, 45230, 49753, 90460, 99506, 180920, 199012, 248765, 398024, 497530, 995060, 1990120]

約数ペア:

[(1, 1990120), (2, 995060), (4, 497530), (5, 398024), (8, 248765), (10, 199012), (11, 180920), (20, 99506), (22, 90460), (40, 49753), (44, 45230), (55, 36184), (88, 22615), (110, 18092), (220, 9046), (440, 4523)]